This raspberry blueberry crumb cake recipe is perfect for those who want a tangy and sweet dessert. The cake is made with vanilla extract, which gives it a sweet and slightly floral flavor. The blueberry and raspberry filling is made with fresh or frozen berries, lemon juice, and sugar, which gives it a tangy and sweet taste. The crumb topping is made with butter, flour, and sugar, which gives it a crunchy texture. This recipe is easy to make and can be served warm or cold, with a dollop of whipped cream or a scoop of mixed berry sorbet.
